985818761 has 2 divisors, whose sum is σ = 985818762. Its totient is φ = 985818760.

The previous prime is 985818733. The next prime is 985818767. The reversal of 985818761 is 167818589.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 928725625 + 57093136 = 30475^2 + 7556^2 .

It is a cyclic number.

It is not a de Polignac number, because 985818761 - 2¹⁰ = 985817737 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (985818767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492909380 + 492909381.

It is an arithmetic number, because the mean of its divisors is an integer number (492909381).

Almost surely, 2^985818761 is an apocalyptic number.

It is an amenable number.

985818761 is a deficient number, since it is larger than the sum of its proper divisors (1).

985818761 is an equidigital number, since it uses as much as digits as its factorization.

985818761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 53.

The square root of 985818761 is about 31397.7508907883. The cubic root of 985818761 is about 995.2503973227.

The spelling of 985818761 in words is "nine hundred eighty-five million, eight hundred eighteen thousand, seven hundred sixty-one".